### Killer Sudoku by Thomas Snyder

*[This puzzle comes from the 2022 US Sudoku Grand Prix round. This Killer Sudoku was one of my favorite constructions even though I don’t write the style too often. I wanted to get a chain of “last-digit eight” clues into a loop in the grid, and managed to find cage sizes that made good use of 8, 18, 28, and 38 values in this grid. While a few given digits were needed to seed the solving path, that did not diminish the unique “eight” theme visually or logically.]*

or solve online (using our beta test of Penpa-Edit tools)

**Theme:** Eight Ouroboros

**Author/Opus:** This is the 442nd puzzle from Thomas Snyder, aka Dr. Sudoku.

**Rules:** Standard Sudoku rules. Also, the sum of the digits in each cage must equal the value given in the upper-left corner of that cage. Digits cannot repeat inside a cage.

**Estimated Difficulty:** 3.5 stars

**Solution:** PDF

**Note:** Follow this link for more Killer Sudoku and this link for classic Sudoku. More Killer Sudoku puzzles can be found in *Killer Sudoku* by Serkan Yürekli.